| UTR Pro Tennis Series Amsterdam | 2021/11/05 13:30 | Guy Den Heijer v Willems, Johann | 7-6,2-6,6-4 |
| UTR Pro Tennis Series Amsterdam | 2021/11/04 12:00 | Jip Van Assendelft v Willems, Johann | 3-6,2-5 |
| UTR Pro Tennis Series Amsterdam | 2021/11/02 12:00 | Miko Wassermann v Willems, Johann | 2-6,2-6 |
| UTR Pro Tennis Series Amsterdam | 2021/11/01 13:30 | Willems, Johann v Lawrence Bataljin | 6-1,5-1 |
| UTR Pro Tennis Series Mulheim | 2021/10/17 08:30 | Willems, Johann v Hansen, Christian | 6-1,5-1 |
| UTR Pro Tennis Series Mulheim | 2021/10/16 08:15 | Schmitz, Constantin v Willems, Johann | 3-6,1-6 |
| UTR Pro Tennis Series Mulheim | 2021/10/15 11:30 | Eric Vanshelboim v Willems, Johann | 2-6,4-6 |
| UTR Pro Tennis Series Mulheim | 2021/10/14 08:30 | Balderas, Diego v Willems, Johann | 0-6,2-6 |
| UTR Pro Tennis Series Amsterdam | 2021/11/05 10:30 | Verbeek, Sem v Minakov, Mikhail | 6-2,6-3 |
| UTR Pro Tennis Series Amsterdam | 2021/11/04 13:30 | Admiraal, Amadatus v Minakov, Mikhail | 3-6,4-5 |
| UTR Pro Tennis Series Amsterdam | 2021/11/02 14:30 | Clavel, Tom v Minakov, Mikhail | 6-7,5-7 |
| UTR Pro Tennis Series Amsterdam | 2021/11/01 10:30 | Minakov, Mikhail v Dhoe, Benjamin | 6-0,7-6 |
| ITF M15 Parnu | 2021/10/28 09:00 | Minakov, Mikhail v Wojcik, Yann | 3-6,2-6 |
| ITF M15 Parnu | 2021/10/27 10:15 | Minakov, Mikhail v Schiavetti, Pietro | 6-4,6-3 |
| ITF M15 Parnu | 2021/10/26 08:00 | Minakov, Mikhail v Ying Hou | 6-1,6-3 |
| ITF M15 Parnu | 2021/10/25 08:00 | Minakov, Mikhail v Kichigin, Vasiliy | 6-3,6-2 |